Fluid operated reversing valve



June 16, 1931. w F. HOHULIN FLUID OPERATED REVERSING VALVE Filed April 25 1930 2 Sheets-Sheet l A tiorney June 16, 1931. w. F. HOHULIN 1,809,938

FLUID OPERATED REVERSING VALVE Filed April 25. 1930 2 Sheets-Sheet 2 Patented June 16, 1931 WILHELM F. nonumn,

or OTTAWA, ILLINOIS FLUID OPERATED REVERSING VALVE Application filed April 25,

This invention relates to new and useful improvements in reversing valves of the general type illustrated and described in my co-pending application Serial Number 433,104, filed under date of March 4, 1930,

and upon which this invention constitutes an improvement. v

The primary object of this invention is to provide, in a manner as hereinafter described,

' a valve of the character described embodying body mechanical and fluid actuating means for completing the reversing movement of the valve when the same is in use, said valve being particularly adapted for use in controlling the passage of actuating fluid to the opposite end portion of a cylinder in which a piston is mounted for reciprocatory movement, said piston being actuated by the. fluid.

The foregoing and still further obj ects and advantages of the invention will be obvious from aconsideration of the following specification and the accompanying drawings forming a part of this application and in which similar reference characters designate like parts throughout the several views.

In said drawings Figure 1 is a longitudinal sectional view of a reversing valve constructed in accordance with this invention.

Figure 2 is a sectional view taken substantially-on the line 2--2of Figure 1 looking in the direction of the arrows. 2 Figure 3 is a horizontal sectional view taken substantially on the line-33 of Figure 2, looking in the direction indicated by the arrows. Figure 4 is a detail. view the core.

Referring to the drawings in detail, it will be seen that the reference numeral 1 .desighates generally a casing comprising a substantially annular body '2 which is open at both ends and has detachably secured on said ends the closure plates or walls 3 -and 4. The member 2, in'conjunction with the plates 3 and 4, provides acircular compartment or chamberfihaving a centrally disposed inlet port provided by t the internally threaded. nipple 6 formed integrally with the plate 3.

in elevation of An outlet port 7 is also provided, the same 1930. Serial No. 447,255.

being disposed in the member 2 and the walls thereof also being threaded. The inlet port 6 and the outlet port 7 are adapted to have connected thereto suitable conduits (not shown).' The housing 1 is further provided with the ports 8 and 9 arranged diagonally therein with respect to each other and which communicate'with opposite ends of a cylinder (not shown) through the medium of suitable conduits (also not shown) which are secured 69 thereto through the medium of the internally threaded portions 10 and 11 respectively.

' Also formed in the inner periphery of the annular member 2 of the casing 1 is a pair of channels or grooves 12 and 13 which extend. inwardly from opposite ends of the member 2, each groove or channel terminatmg in spaced relation to the other end of the member 2. In other words, the groove 12 extends from the plate 3 to a point in spaced'" relation to the plate 4 and the groove 13'extends from the plate 4 to a point in spaced relation to the plate 3.

A shaft 14 is rotatably mounted centrally in'the chamber 0 in alignment withthe nipple 6 through the medium of the shank 15 which is journaled centrally through the plate 4 and has keyed on itsouter portion an actuating lever 16 which-is secured thereon through the medium of the washer 17 and the nut 18 which is threaded on the free end portion of said shank 15.

' A core '19 is rotatably and slidably mounted in the cha1nber5, said core being rotatably supported onthe nipple 6 and on the shaft 8b 14 to which the same is keyed for rotation therewith upon actuation of the lever-16. As will be'apparent, the core 19 is mounted for longitudinal sliding movement on the shaft 14 and the nipple 6. The core 19yis formed to provide a central chamber 20 with which the inlet port 6 communicates at all times.

Thecore '19 is further provided with a peripheral channel 21 the opposite ends of which terminate'in spaced relation, as illustrated to advantage in Figure 4 of the drawings- The ungrooved peripheral portion of the core 19 provides a transverse rib 22 eX- tending thereacross. A protuberance 23 is r d on one d of the serel? b shrre- 1M jects into the groove 21 to provide a passage 24 adapted for communication alternately with the ports 8 and 9. The core 19 is still further provided with a passage 25 for alternately establishing communication between the chamber 20 and the grooves 12 and 13 upon oscillatory movement of said core in the casing. The opposite ends 'of the core have formed integrally thereon the segmental bosses 26 and 27 for abutting engagement with the plates 3 and 4, respectively to arrest the sliding movement of the core in the casting in spaced relation to said plates 3 and 4, as illustrated to advantage infFigure 1 of the drawings.

In operation, the lever 16 is operatively connected by any suitable means to the reciprocating piston rod for oscillatory actuation thereby. When said lever 16 is swung in one direction, the core 19 is rotated in a manner to bring the passage 25 into registry with the groove 13. Fluid then enters the chamber' 20 through the inlet. port 6 and passes from saidchamber 20 through the passage 25 through the groove 13 and into the space maintained between the core 19 and the wall 4 of the casing 1 by the boss 27. The pressure of the fluid will slide the core to the position illustrated in Figure 1 of the drawings and the passage 24 therein is brought into communication with the port 8 and the groove 21 in the periphery of the core is brought into communication with the port 9. The fluid then passes from the chamber 20 through the passage 24 through the port 8 and to one side of the cylinder with which the valve is connected. The fluid from the opposite side of the cylinder will enter the casing 1 through the port-.9 and pass through the peripheral groove 21 and be discharged through the outlet nort 7.

When the lever 16 is swung in the opposite direction, the passage 25 is brought into communication with the groove 12, the passage 24 is moved out of communication with the port 8 and is disposed at a point opposite the port 9. The groove 13 on the inner periphery of the member 2 is brought into communication with the peripheral-groove 21 of the core 19. Fluid then passes through the inlet port 6 into the core chamber 20, then through the passagev 25 and through the groove 12 into the space maintained between the core 19 and the plate 3 by theboss 26 with the result that thesaid core 19 is shiftedlongitudinally in the housing 1 toward the opposite wall or plate 4. When this movement takes place, the fluid between the core 19 and the plate 4 escapes therefrom through the groove 13 into the peripheral groove 21' and is discharged through the outlet port 7; The movement of the core 19toward .the plate 4: brings the passage 24 into communication with the port 9 and also brings the peripheral groove 21 into communication With the port 8. Fluid then passes into the core chamber 20 through the inlet port 6 then through the passage 2 1 and through the port 9 to the 0p posite end of the cylinder in a manner to reverse the movement of the piston therein. The fluid from the first named end of the cylinder passes through the port 8 into the peripheral groove 21 of the core 19 and is discharged from the casing 1 through the outlet port 7 Itis believed that the many advantages of a valve constructed in accordance with this invention will'be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to beunderstood thatchangesin the details of construction may be had which will fall within the scope of the invention as claimed.

What is claimed is :f

1. A valve of the character described comprising a casing having an inlet porta-nd'an outlet port and further havinga pair of diagonally spaced ports, a shaft mounted for oscillatory movement inthe casing, a Valve core slidably keyed on the, shaft-for oscillatory movement therewith and being provided with means for establishing communication between the inlet port and one of the ports of the pair and between the outlet port and the other port of said pair upon rotary and sliding movement of the core in one direction and for establishing communication between the inlet port and the second named port of the pair and between the outlet port and the first named port of the pair upon, rotary and slidingmovement of the core in the opposite direction. V

2. A valve of the character described comprising a casing having an inlet port and an outlet port and further having a pair of diagonally spaced ports, a shaftmounted for oscillatory movementin the casing, a valve core slidably keyed on the shaft for oscillatory movement therewith. and being provided with means for establishing communication between the inlet port and one of the ports of the pair and: between the outlet port and the other port of said pair upon rotary and sliding movement of the core in one direction and for establishingcommunication between the inlet port and the second named port of the pair and betweentheoutlet port and the first named port of the pair upon rotary and sliding movement ofv the core in the opposite direction, means. for. oscillating the shaft and the core in the casing and coacting means provided in the core and the casing for establishing communication alternately betweenthe inlet port and one end portion of the casing at one endof: the core and between the outlet port and the opposite end portion ofthe casing at the opposite end portion of thecore upon sliding movement. ofsaid. core in one direction and for establishing, communication. between. the inlet. port and the second named end portion of the casing at the second named end portion of the core and between the outlet port and the first named end portion of the casing at the first named end portion of the core upon rotary and sliding movement of said core in the opposite direction.

3. A valve of the character described comprising a casing having a centrally disposed inlet port communicating therewith and a peripherally disposed outlet port communicating therewith, said casingv being further provided with a pair of peripherally disposed diagonally spaced ports, a shaft mounted for oscillatory movement in the casing, means for actuating said shaft, a valve core slidably supported on the shaft and keyed thereto for oscillatory movement therewith, said core of less length than the casing for providing a pair of fluid receiving chambers at its opposite ends in the casing, means on the opposite ends of the core for arresting the sliding movement thereof in spaced relation to the opposite ends of the casing, said core being provided with a central chamber in constant communication with the inlet port and with a peripherally extending groove in constant'communication with the outlet port, said core being further provided with a passage adapted to establish communication between the central chamber and one of the pairs of ports upon rotary and sliding movement of the same in one direction in the casing, the peripheral groove establishing communication between the outlet port and the other port of the pair, said passage being further adapted to establish communication between the central chamber and the other port of the pair upon rotary and sliding 1 movement of the core in the opposite direction, the peripheral groove establishing communication between the outlet port and the first named port of the pair, said casing being further provided with a pair of grooves ex- 5 tending from an intermediate portion thereof to the opposite end portion thereof, said core being still further'provided with apassage adapted to alternately establish communication between the central chamber and the casing groove upon oscillatory movement of the core in the casing, one of said grooves communicating with the peripheral groove of the core when the other of said grooves is in communication with the central chamber of the core, said groove and the second named passage in the core constituting means for alternately conducting and discharging fluid into and from the opposite end portion of the casing.

'In testimony whereof I aflix my signature.

WILHELM F. HOHULIN. 

